package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer websocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     */
    @Transactional
    public OrderSubmitVO orderSubmit(OrdersSubmitDTO ordersSubmitDTO) {
        //1. 处理业务异常(地址簿为空,购物车为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null || shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2. 向订单表插入一条数据
        Orders orders = Orders.builder()
                .userId(userId)
                .orderTime(LocalDateTime.now())
                .number(String.valueOf(System.currentTimeMillis()))
                .status(Orders.PENDING_PAYMENT)
                .payStatus(Orders.UN_PAID)
                .consignee(addressBook.getConsignee())
                .phone(addressBook.getPhone())
                .address(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail())
                .build();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orderMapper.insert(orders);

        //3. 向订单明细表插入n条数据(订单明细表是保存订单的购物车数据的)
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for(ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //4. 清空购物车数据
        shoppingCartMapper.deleteByUserId(orders.getUserId());

        //5. 封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(String.valueOf(orders.getId()))
                .orderTime(LocalDateTime.now())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        List<ShoppingCart> shoppingCartList = new ArrayList<>();

        for(OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }

        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 查询历史订单
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult historyOrders(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        ArrayList<OrderVO> orderList = new ArrayList<>();

        assert page != null;

        for(Orders orders: page.getResult()) {
            List<OrderDetail> list = orderDetailMapper.getByOrderId(orders.getId());
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            orderVO.setOrderDetailList(list);
            orderList.add(orderVO);
        }

        return new PageResult(page.getTotal(), orderList);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    public void cancel(Long id) {
        Orders orders = orderMapper.getById(id);

        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        orders.setStatus(6);
        orderMapper.update(orders);

        //无商户号
//        // 订单处于待接单状态下取消，需要进行退款
//        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    orders.getNumber(), //商户订单号
//                    orders.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());

        if(orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        } else if(orders.getStatus() > 4 || orders.getStatus() < 3) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //无商户号
//        //支付状态
//        Integer payStatus = orders.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 拒绝订单
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());

        //无商户号
//        //支付状态
//        Integer payStatus = orders.getPayStatus();
//        if (payStatus.equals(Orders.PAID)) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 各个状态订单数量统计
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = orderMapper.getById(ordersConfirmDTO.getId());
        if(orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        } else if(orders.getStatus() != 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        if(orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        } else if(orders.getStatus() != 3) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 更新状态
     * @param ordersPaymentDTO
     */
    public void updateStatus(OrdersPaymentDTO ordersPaymentDTO) {
        Long id = Long.valueOf(ordersPaymentDTO.getOrderNumber());
        Orders orders = orderMapper.getById(id);
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        orders.setPayStatus(Orders.PAID);
        orderMapper.update(orders);

        Orders ordersDB = orderMapper.getById(id);
        Map<String, Object> map = new HashMap<>();
        map.put("type", 1);
        map.put("orderId", ordersPaymentDTO.getOrderNumber());
        map.put("content", "订单号: " + ordersDB.getNumber());

        String json = JSON.toJSONString(map);
        websocketServer.sendToAllClient(json);
    }

    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if(ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map<String, Object> map = new HashMap<>();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号: " + ordersDB.getNumber());

        String json = JSON.toJSONString(map);
        websocketServer.sendToAllClient(json);
    }
}
